Move AudioRenderer out of Filter heirarchy.

media/base/filter_host.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // FilterHost describes an interface for individual filters to access and
 // modify global playback information.  Every filter is given a filter host
 // reference as part of initialization.
 //
 // This interface is intentionally verbose to cover the needs for the different
 // types of filters (see media/base/filters.h for filter definitions).  Filters
@@ skipping 25 matching lines @@
   // Gets the duration.
   virtual base::TimeDelta GetDuration() const = 0;
 
   // Sets the natural size of the video output in pixel units.
   virtual void SetNaturalVideoSize(const gfx::Size& size) = 0;
 
   // Notifies that this filter has ended, typically only called by filter graph
   // endpoints such as renderers.
   virtual void NotifyEnded() = 0;
 
-  // Disable audio renderer by calling OnAudioRendererDisabled() on all
-  // filters.
-  virtual void DisableAudioRenderer() = 0;
-
  protected:
   virtual ~FilterHost() {}
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_FILTER_HOST_H_